Combined intake and exhaust manifold



G. B. RAIT. COMBINED INTAKE AND EXHAUST MANIFOLD. APPLICATION FILEDram/3.1919.

1,431,896.y Patented ont. 10,1922.

- A Y n IIIIIIIIIIlIlIIIIIIII/ G. B. RAIT.

COMBINED INTAKE AND EXHAUST MANIFOLD.

APPucAloN man MAYS. 1919.

Patented Oct. 10, 1922.

2 SHEETS-SHEET 2.

Patented ct. 10, 1922.

tllill'l'll)` STATES PATENT OFFMIE.

, COMBINED INTAKE AND EXHAUST MANIFOLD.

Application filed May 3,

To all whom t may Concern Be it known that I, GEORGE B. RAIT, a citi*Zen of the United States, residing at Minneapolis, in the county ofHennepin and State of Minnesota, have invented certain new and useful`Improvements in Combined Intake and Exhaust Manifolds; and l do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention has for its object vto provide an extremely simple, compactand highly ellicient combined intake manifold and exhaust manifold,wherein the fuel is properly heated and vaporized by the exhaust justbefore the same enters the engine cylinders.

To the above end the invention consists of the novel devices andcombinations of devices hereinafter 'described and defined in the claim.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings Fig. l is a view, partly in elevation andpartly in central section, of the combined intake manifold and exhaustmanifold;

Fig. 2 is a view in horizontal section taken on the irregular line 2--2of Fig. l;

Fig. 3 is a vertical section taken on the irregular line 3-3 of F ig. l5

.F l is a view in horizontal section taken on the irregular line 4WA- ofFig. 3;

Fig. 5 is a 'view principally in transverse vertical section taken onthe line 5-5 of liig. il on an enlarged scale;

ifig. 6 is a View in transverse vertical serM tion taken on the line 6 6of Fig. l. ou an enlarged scale; and

F ig. is a view in transverse vertical section taken on the irregularline 7-7 of Fig. 3 on an enlarged scale.

The numeral 8 indicates an intake manifold, and the numeral 9 indicatesan exhaust manifold, cast intcgrahthe one with the other. The exhaustmanifold 9 has in its side, next to the engine, to which it is applied,a plurality of bossed-o'penings l0, arranged to register with theexhaust ports of the engine. Bolts, not shown, detachably connect thecombined intake and exhaust manifolds to the engine, and are insertedthrough sleeves ll.. These sleeves extend. transversely isis. serial No.294,439.

through the exhaust manifold 9, are cast integral with the twomanifolds. The delivery end of the exhaust manifold 9 is screw threadedat l2 to receive a coupling, not shown, for connecting an exhaust pipeto said exhaust manifold.

The upper or top portion of the intake manifold is located within theexhaust manifold and forms a portion of the bottom thereof. The lowerportion of the intake manifold is located outward of and below the exhaust manifold and is connected to the carburetor, not shown, in thecustomary manner. As best shown in Fig. 5, the sides of the intakemanifold 8, within the exhaust manifold 9, are spaced apart from thesides thereof to subject the same to the hot gases passing through theexhaust manifold.

The delivery end portions of the arms of the intake manifold are curvedto form elbows, located entirely within the exhaust manifold and spacedapart therefrom to per mit the hot gases to pass completely therearound.The elbows of the intake manifold are extended through the same side ofthe exhaust manifold, in which the openings l0 are formed, and arrangedto register with the intake ports of the engine.

From the above description it is evident that the fuel for the engine intraveling through. the arms of the intake manifold is partially heatedand vaporized by the heat :from the hot exhaust gases in passing overand along the sides of that portion of said arms within the exhaustmanifold. A continued movement of the fuel into the elbows of the armsof the exhaust manifold subjects the saine to a greater heat for the.reason that said elbows are entirely within the exhaust manifold andthe hot gases pass completely thei'earound, thus further heating andvaporizing the fuel and preventing condensation at the time the fuelenters the engine cylinder. As previously stated, the combined intakemanifold and exhaust manifold is extremely simple, easy to cast andapply or remove from a cylinder casting.

Vhat l claim is An integrally cast combined intake manifold and exhaustmanifold, said intake mani fold comprising a tubular body portion thatextends longitudinally of the body of said exhaust manifold, the mainbody of the intake manifold being located below the exhaust manifoldwith its rounded upper porgases will pass completely around saidelbowtion extended upward into the exhaustJ manilike extremities.

fold and forming a portion of the bottom In testimony whereof I affix mysignature thereof, said intake manifold having tubular in presence oftwo witnesses.

elbow-like extremities that extend upward GEORGE B. RAIT. and laterallyto one side wall of said exhaust manifold andfarespao'ed from the'topand bottom of the latter, so that the exhaust Witnesses:

CLARE DEMARLEST, HARRY D. KILGoRE.

